A grape growth self-adaptive bird and insect prevention bag based on a tensile expansion support structure and a preparation method thereof

Abstract

The present application provides a kind of grape growth adaptive bird and insect prevention bag based on auxetic support structure and its preparation method, including bag body, bag body includes elastic outer bag, and the auxetic support structure of setting in elastic outer bag, auxetic support structure includes tubular porous cell auxetic material, the bottom periphery of bag body is fixed with flexible air-permeable material sheet, and the top is formed into bundle mouth structure;With the growth of grape, auxetic support structure is subjected to longitudinal tension, and lateral expansion will occur, adapt to grape longitudinal and transverse growth, when grape ripens, bag expansion, approximate cluster shape, intuitive reaction grape mature cluster size, facilitate the classification of cluster size;And grape fruit and elastic outer bag between setting auxetic support structure as support, can prevent elastic outer bag and fruit adhere, ensure ventilation, set up air-permeable material in the bottom of bag, can ensure ventilation effect;Use elastic outer bag as the outermost layer of grape bagging, so that grape bagging has waterproof property, and has the function of preventing insects and birds.

Description

Technical Field

[0001] This invention relates to the field of grape cultivation technology, specifically to a grape growth adaptive bird and insect-proof bag based on a tensile support structure and its preparation method. Background Technology

[0002] In grape cultivation, bagging is a key measure to improve fruit quality, reduce pesticide residues, and prevent pests and diseases. Currently, most common protective bags use a fixed-size design. For example, the insect-proof protective bagging device described in CN216452269U uses a double-layered bag with insect-repelling sponge and ventilation holes to improve ventilation and insect control. However, the inner and outer bags in this invention are rigid or semi-rigid connections. Although there are gaps between the bags, the space cannot expand as the fruit grows. Using larger bags not only wastes materials but also causes significant swaying and resistance on the grape stems in the wind, increasing the load on the stems and potentially causing fruit drop. Furthermore, because the bags are opaque, the size of the grape bunches cannot be visually assessed during ripening. Conversely, using smaller bags can compress the fruit as it rapidly expands, restricting its natural growth.

[0003] For example, CN210247738U proposes an environmentally friendly protective cover that uses non-woven fabric and combines adjustable flaps and label structures to achieve fixation and information recording functions. Although the existing technology has optimized the breathability and insect-proof performance to a certain extent, the overall bag body is still a fixed volume and cannot be adaptively adjusted with the growth and development of the fruit. Therefore, it cannot continuously provide sufficient space during the fruit growth process, and the size of the grape bunch cannot be intuitively perceived when the grapes ripen.

[0004] The prior art (201810436784.0) discloses a two-dimensional periodic negative Poisson's ratio controllable tensile material. By cutting regularly arranged holes in different directions in a two-dimensional planar matrix material, the ordinary material can have a negative Poisson's ratio effect. The material will expand laterally when subjected to axial tension and contract laterally when subjected to axial compression. However, when the matrix material is an elastic material, it will contract after the tension is withdrawn, and it is impossible to fix its expanded shape. Summary of the Invention

[0005] Existing fruit bags are made of opaque material, making it impossible to visually perceive the size of the grape bunches when the grapes are ripe. To solve the above problem, a grape growth adaptive bird and insect-proof bag based on a tensile support structure and its preparation method are provided.

[0006] This invention is implemented in the following manner:

[0007] A grape growing adaptive bird and insect protection bag based on a tensile support structure includes a bag body, the bag body including an elastic outer bag and a tensile support structure disposed inside the elastic outer bag, the tensile support structure including a tubular porous cellular tensile material, a flexible breathable material sheet fixed around the bottom periphery of the bag body, and a drawstring structure formed at the top.

[0008] Preferably, the top forming of the drawstring structure is as follows: a rope hole is opened on the top periphery of the elastic outer bag, a tie is inserted into the rope hole, and the rope hole and the tie are combined to form a drawstring structure. The top edge of the tension support structure is higher than the top edge of the elastic outer bag, so that the top of the tension support structure is also tightened during the process of the elastic outer bag being drawn.

[0009] Preferably, the top forming of the drawstring structure is as follows: the top periphery of the elastic outer bag is provided with rope holes, and a strap is threaded through the rope holes. The strap is also threaded through the expansion hole at the top of the expansion support structure. The rope holes, straps and expansion holes cooperate to form the drawstring structure.

[0010] Preferably, the pores in the porous cell expansion material are dumbbell-shaped pores, which are alternately arranged horizontally and vertically along the long axis and also alternately arranged horizontally and vertically along the short axis, forming a dumbbell-shaped pore array with alternating horizontal and vertical arrangements. The short axis of the dumbbell-shaped pores is provided with an anti-rebound insertion and abutment support structure to prevent the porous cell expansion material from returning to its original shape when the tension is withdrawn.

[0011] Preferably, the anti-rebound insertion and removal abutment support structure includes a slot and a rod. One end of the slot is set on the hole wall a, and the other end is a groove. One end of the rod is fixed on the hole wall b, which is symmetrical to the hole wall a, and the other end is a V-shaped plug. The width of the V-shaped plug is greater than the width of the groove. In the initial state, the rod is located in the slot. In the tensile state, the V-shaped plug and the end of the groove at the slot abut together to form a support.

[0012] Preferably, the slot has a flared opening at one end away from the slot opening. The flared opening cooperates with the V-shaped plug. In the inserted state, the V-shaped plug is located inside the flared opening. In the stretched state, the width of the V-shaped plug is greater than the width of the slot opening. The V-shaped plug abuts against the end of the slot to form a support.

[0013] Preferably, the parent material is an engineering plastic.

[0014] Preferably, the thickness of the matrix material is 5-10 mm.

[0015] Preferably, the elastic outer bag is made of thermoplastic elastomer or thermoplastic polyurethane, and the flexible breathable material sheet is made of biodegradable nonwoven fabric.

[0016] Preferably, the tensile support structure is fixedly connected to the upper and lower edges of the elastic outer bag by heat pressing or bonding, and the bottom of the tensile support structure and the elastic outer bag is fixedly connected to the flexible breathable material sheet by heat pressing or bonding.

[0017] A method for preparing a porous cell-based tensile material, wherein the porous cell-based tensile material is the porous cell-based tensile material in the grape growth adaptive bird and insect-proof bagging based on a tensile support structure as described in any one of claims 1 to 9, comprising the following steps.

[0018] Engineering plastic sheets are placed between the upper pressure roller and the lower cutter roller for punching and cutting to form a porous cellular expanded material.

[0019] The upper pressure roller and the lower cutter roller are arranged in parallel. The upper pressure roller is a flat roller. The surface of the lower cutter roller is provided with a forming punching die with alternating horizontal and vertical array dumbbell-shaped holes and an anti-rebound insertion and abutment support structure inside the holes.

[0020] Compared to existing technologies, this invention uses a tensile support structure and an elastic outer bag as grape bags. In the early stages of fruit growth, the space inside the bag is sufficient for grape growth. As the grapes grow, the tensile support structure is subjected to longitudinal tension. Because the tensile support structure is made of porous cellular tensile material, it will expand laterally when subjected to axial tension, adapting to the longitudinal and lateral growth of the grapes. When the grapes ripen, the bag expands, presenting a shape similar to a bunch of grapes, which visually reflects the size of the bunches at maturity and facilitates the classification of bunch size. Furthermore, the tensile support structure is set between the grapes and the elastic outer bag as a support, which can prevent the elastic outer bag from sticking to the fruit and ensure ventilation. Breathable material is set at the bottom of the bag to ensure ventilation effect. Using an elastic outer bag as the outermost layer of the grape bag makes the grape bag waterproof and has the functions of preventing insects and birds. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the front section structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the front section structure of another embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention in its expanded state.

[0024] Figure 4 This is a top-section structural diagram of the present invention.

[0025] Figure 5 This is a schematic diagram of a flat, tension-supported structure in its unstretched state.

[0026] Figure 6 yes Figure 5 Partial schematic diagram.

[0027] Figure 7 yes Figure 6 A schematic diagram of the anti-rebound insertion and abutment support structure.

[0028] Figure 8 This is a schematic diagram of a flat taut support structure under tension.

[0029] Figure 9 yes Figure 8 Partial schematic diagram.

[0030] Figure 10 yes Figure 9 A schematic diagram of the anti-rebound insertion and abutment support structure.

[0031] Figure 11 This is a schematic diagram of the manufacturing process of porous cell-based tensile materials.

[0032] Figure 12 It is a device for preparing porous cell-based expanded materials.

[0033] Among them, 1 is the bag body; 11 is the elastic outer bag; 12 is the tensile support structure; 13 is the flexible breathable material sheet; 2 is the drawstring structure; 21 is the rope hole; 22 is the strap; 3 is the porous cellular tensile material; 4 is the hole; 41 is the hole wall; 411 is the hole wall a; 412 is the hole wall b; 5 is the anti-rebound insertion and removal support structure; 51 is the slot; 511 is the groove; 512 is the flared mouth; 52 is the insertion rod; 521 is the V-shaped plug; 6 is the upper pressure roller; 7 is the lower cutter roller. Detailed Implementation

[0034] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer with the description. However, unless otherwise specified, the specific experimental methods involved in the following embodiments are conventional methods or implemented according to the conditions recommended in the manufacturer's instructions.

[0035] like Figures 1-10As shown, a grape growing adaptive bird and insect-proof bagging system based on a tensile support structure includes a bag body 1. The bag body 1 includes an elastic outer bag 11 and a tensile support structure 12 disposed within the elastic outer bag 11. The tensile support structure 12 includes a tubular porous cellular tensile material 3. A flexible breathable material sheet 13 is fixed around the bottom periphery of the bag body 1, and a drawstring structure 2 is formed at the top to fix the bag to the grape stem. Using the tensile support structure and the elastic outer bag as a grape bag, as the grape grows, the tensile support structure is subjected to longitudinal tension. Because the tensile support structure is composed of porous cellular tensile material, it will expand laterally when subjected to axial tension, adapting to the longitudinal and lateral growth of the grape. Furthermore, the tensile support structure, placed between the grape fruit and the elastic outer bag as a support, prevents the elastic outer bag from sticking to the fruit, ensuring ventilation. The breathable material at the bottom of the bag ensures ventilation. Using the elastic outer bag as the outermost layer of the grape bag makes it waterproof and provides insect and bird protection.

[0036] In one embodiment, such as Figure 1 As shown, the top forming of the drawstring structure 2 is as follows: a rope hole 21 is provided on the top periphery of the elastic outer bag 11, and a binding strap 22 is inserted into the rope hole 21. The rope hole 21 and the binding strap 22 cooperate to form the drawstring structure 2. The top edge of the tension support structure 12 is higher than the top edge of the elastic outer bag 11, so that the top of the tension support structure 12 is also tightened during the process of the elastic outer bag 11 being drawn.

[0037] In another embodiment, such as Figure 2 As shown, the top forming of the drawstring structure 2 is as follows: the top periphery of the elastic outer bag 11 is provided with rope holes 21, and a strap 22 is inserted into the rope holes 21. The strap 22 is also inserted into the expansion hole at the top of the expansion support structure 12. The rope holes 21, the strap 22 and the expansion hole cooperate to form the drawstring structure 2.

[0038] Furthermore, such as Figures 5-10 As shown, the holes in the porous cell expansion material 3 are dumbbell-shaped structure holes (4). The dumbbell-shaped structure holes (4) are arranged alternately horizontally and vertically along the long axis and also alternately horizontally and vertically along the short axis, forming a dumbbell-shaped structure hole (4) in an alternating array. The short axis of the dumbbell-shaped structure hole (4) is provided with an anti-rebound insertion and abutment support structure (5) to prevent the porous cell expansion material from returning to its original state when the tension is withdrawn.

[0039] like Figure 6 As shown, the major axis of the dumbbell-shaped hole 4 is axis a in the figure, and the minor axis is axis b in the figure.

[0040] The porous cell expansion material is a negative Poisson's ratio controllable expansion material disclosed in the prior art (201810436784.0). The dumbbell-shaped structure hole 4 is formed by cutting four circles, such as the dumbbell-shaped structure hole 4 formed by cutting the positioning circle and the circumscribed circle in the prior art (201810436784.0). Since the negative Poisson's ratio material will expand laterally when subjected to axial tension and will shrink laterally when subjected to axial compression, it is impossible to fix the shape after expansion. Based on this, the present invention makes an improvement, specifically: the short axis of the dumbbell-shaped structure hole (4) is provided with an anti-rebound insertion and abutment support structure (5). That is, the anti-rebound insertion and abutment support structure 5 is set at the point of maximum deformation in the dumbbell-shaped structure hole (4), preventing the porous cell expansion material from returning to its original shape when the tension is withdrawn, maintaining the shape under tension, forming a support structure, improving the load-bearing capacity, and supporting the elastic outer bag 11.

[0041] like Figure 6 , 7 As shown, the anti-rebound insertion and removal support structure 5 includes a slot 51 and a rod 52. One end of the slot 51 is set on the hole wall a411, and the other end is a groove 511. One end of the rod 52 is fixed on the hole wall b412, which is symmetrical to the hole wall a411, and the other end is a V-shaped plug 521. The width of the V-shaped plug 521 is greater than the width of the groove 511. In the initial state, the rod 52 is located in the slot 51. In the tensile state, the V-shaped plug 521 and the end of the slot 511 of the slot 51 abut together to form a support.

[0042] Furthermore, the slot 51 has a flared opening 512 at one end away from the slot opening 511. The flared opening 512 mates with the V-shaped plug 521, and in the inserted state, such as Figure 6 , 7 As shown, the V-shaped plug 521 is located inside the flared opening 512, and in the stretched state, as... Figure 9 , 10 As shown, the width of the V-shaped plug 521 is greater than the width of the slot 511 of the slot 51, and the V-shaped plug 521 abuts against the end of the slot 51 to form a support.

[0043] The base material 3 is an engineering plastic, selected from polyamide (PA), polycarbonate (PC), polyoxymethylene (POM), and polylactic acid (PLA), preferably nylon. The thickness of the base material 3 is 5-10 mm, which improves the support strength of the tensile support structure 12.

[0044] The elastic outer bag 11 is made of thermoplastic elastomer (TPE) or thermoplastic polyurethane (TPU), preferably made of bio-based TPU material.

[0045] The flexible, breathable material sheet 13 is made of biodegradable non-woven fabric, which is breathable and provides continuous ventilation, ensuring that the fruit can still breathe effectively in the later stages of growth, reducing humidity inside the bag and inhibiting the growth of bacteria. At the same time, the good light transmission and ventilation environment is conducive to the accumulation of sugar and the formation of flavor substances in the fruit, thereby improving the sweetness, color and overall flavor of the grapes.

[0046] The tensile support structure 12 is fixedly connected to the upper and lower edges of the elastic outer bag 11 by heat pressing or bonding. The bottom of the tensile support structure 12 and the elastic outer bag 11 is fixedly connected to the flexible breathable material sheet 13 by heat pressing or bonding.

[0047] A porous cell tensile material with an anti-rebound insertion and abutment support structure 5 is prepared by 3D printing or roll forming. The sheet-like porous cell tensile material is rolled into a tube and fixed at the joint by heat melting or binding to form a tensile support structure 12.

[0048] A method for preparing a porous cell-based tensile material, wherein the porous cell-based tensile material is a porous cell-based tensile material used in grape growth adaptive bird and insect-proof bags based on a tensile support structure, comprising the following steps.

[0049] The engineering plastic sheet is placed between the upper pressure roller 6 and the lower cutter roller 7 for punching and cutting to form a porous cell-scaled material.

[0050] like Figure 11 , 12 As shown, the upper pressure roller 6 and the lower cutter roller 7 are arranged in parallel. The upper pressure roller 6 is a flat roller. The surface of the lower cutter roller 7 is provided with a forming punching die with alternating horizontal and vertical array dumbbell-shaped holes 4 and an anti-rebound insertion and abutment support structure inside the holes.

[0051] In use, the opening of the grape growth adaptive bird and insect-proof bag provided by this invention is opened and placed over the grapes from bottom to top. The bag opening is tightened by passing the straps 22 through the multiple rope holes 21, fixing the bag to the grape stem. In the early stage of fruit growth, the space inside the bag is sufficient for grape growth. As the grapes grow, the tensile support structure 12 is subjected to longitudinal tension. Since the tensile support structure 12 is made of porous cell tensile material, it will expand laterally when subjected to axial tension, adapting to the longitudinal and lateral growth of the grapes. When the grapes mature, the bag expands, presenting a shape similar to a bunch of grapes, which visually reflects the size of the bunch when the grapes mature, making it easy to classify the bunch size. Furthermore, the tensile support structure 12 is set between the grapes and the elastic outer bag 11 as a support, which can prevent the elastic outer bag 11 from sticking to the fruit and ensure ventilation. Breathable material is set at the bottom of the bag to ensure ventilation effect. Using the elastic outer bag 11 as the outermost layer of the grape bag makes the grape bag waterproof and has the functions of preventing insects and birds.

[0052] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A grape growth adaptive bird and insect-proof bag based on a tensile support structure, comprising a bag body (1), characterized in that, The bag body (1) includes an elastic outer bag (11) and a tensile support structure (12) disposed in the elastic outer bag (11). The tensile support structure (12) includes a tubular porous cell tensile material (3). A flexible breathable material sheet (13) is fixed around the bottom periphery of the bag body (1), and a drawstring structure (2) is formed at the top. The top forming a drawstring structure (2) is as follows: a rope hole (21) is opened on the top periphery of the elastic outer bag (11), and a strap (22) is inserted into the rope hole (21). The rope hole (21) and the strap (22) cooperate to form a drawstring structure (2). The top edge of the tension support structure (12) is higher than the top edge of the elastic outer bag (11), so that the top of the tension support structure (12) is also tightened during the process of the elastic outer bag being drawn; or the top forming a drawstring structure (2) is as follows: a rope hole (21) is opened on the top periphery of the elastic outer bag (11), and a strap (22) is inserted into the rope hole (21). The strap (22) is also inserted into the tension hole at the top of the tension support structure (12). The rope hole (21), the strap (22) and the tension hole cooperate to form a drawstring structure (2). The holes in the porous cell expansion material (3) are dumbbell-shaped structure holes (4). The dumbbell-shaped structure holes (4) are arranged alternately horizontally and vertically along the long axis and also alternately horizontally and vertically along the short axis, forming a dumbbell-shaped structure hole (4) in an alternating array of horizontal and vertical. The short axis of the dumbbell-shaped structure hole (4) is provided with an anti-rebound insertion and abutment support structure (5) to prevent the porous cell expansion material from returning to its original state when the tension is withdrawn. The anti-rebound insertion and removal support structure (5) includes a slot (51) and a rod (52). One end of the slot (51) is set on the hole wall a (411) of the dumbbell-shaped structure hole (4), and the other end is a slot (511). One end of the rod (52) is fixed on the hole wall b (412) symmetrical to the hole wall a (411), and the other end is a V-shaped plug (521). The width of the V-shaped plug (521) is greater than the width of the slot (511). In the initial state, the rod (52) is located in the slot (51). In the tensile state, the ends of the V-shaped plug (521) and the slot (511) of the slot (51) abut together to form a support.

2. The grape growth adaptive bird and insect-proof bagging method based on a tensile support structure according to claim 1, characterized in that, The slot (51) has a flared opening (512) at one end away from the slot opening (511). The flared opening (512) cooperates with the V-shaped plug (521). In the inserted state, the V-shaped plug (521) is located inside the flared opening (512). In the stretched state, the width of the V-shaped plug (521) is greater than the width of the slot opening (511) of the slot (51). The V-shaped plug (521) and the end of the slot (51) abut together to form a support.

3. The grape growth adaptive bird and insect-proof bagging method based on a tensile support structure according to claim 2, characterized in that, The porous cell expansion material (3) is an engineering plastic with a thickness of 5~10mm.

4. The grape growth adaptive bird and insect-proof bagging method based on a tensile support structure according to claim 3, characterized in that, The elastic outer bag is made of thermoplastic elastomer or thermoplastic polyurethane, and the flexible breathable material sheet (13) is made of biodegradable nonwoven fabric.

5. The grape growth adaptive bird and insect-proof bagging method based on a tensile support structure according to claim 4, characterized in that, The expansion support structure (12) is fixedly connected to the upper and lower edges of the elastic outer bag (11) by heat pressing or bonding. The bottom of the expansion support structure (12) and the elastic outer bag (11) is fixedly connected to the flexible breathable material sheet (13) by heat pressing or bonding.

6. A method for preparing a porous cell-based tensile material, wherein the porous cell-based tensile material is the porous cell-based tensile material in the grape growth adaptive bird and insect-proof bagging based on a tensile support structure as described in any one of claims 1 to 5, characterized in that, Includes the following steps, The engineering plastic sheet is placed between the upper pressure roller (6) and the lower cutter roller (7) for punching to form a porous cell expansion material; The upper pressure roller (6) and the lower cutter roller (7) are arranged in parallel. The upper pressure roller (6) is a flat roller. The surface of the lower cutter roller (7) is provided with a horizontal and vertical alternating array of dumbbell-shaped structure holes (4) and a forming punching die with an anti-rebound insertion and abutment support structure inside the holes.

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